Comment 10 for bug 1558562

Reviewed: https://review.openstack.org/311991
Committed: https://git.openstack.org/cgit/openstack/fuel-plugin-influxdb-grafana/commit/?id=dca830b7a4bad8600ddeb7fbd853eb7fc136139a
Submitter: Jenkins
Branch: master

commit dca830b7a4bad8600ddeb7fbd853eb7fc136139a
Author: Guillaume Thouvenin <email address hidden>
Date: Mon May 2 15:59:04 2016 +0200

    Fix deployment in a dedicated env with detach-database plugin

    This patch fixes several issues when deploying detach_database and
    influxdb_grafana plugins on the same nodes:
     - it uses hiera_hash to get data from mysql keyword
     - it prevents the installation of mysql_client if it is already
       installed
     - it manages the existence of a file /root/.my.cnf

    Change-Id: I2237b905861fbdca4a37caf0e48ee1f71fedfc33
    Closes-Bug: #1558562